18409853 has 16 divisors (see below), whose sum is σ = 23445504. Its totient is φ = 14037360.

The previous prime is 18409849. The next prime is 18409871. The reversal of 18409853 is 35890481.

It is a cyclic number.

It is not a de Polignac number, because 18409853 - 2² = 18409849 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18409813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076 + ... + 6162.

It is an arithmetic number, because the mean of its divisors is an integer number (1465344).

Almost surely, 2^18409853 is an apocalyptic number.

It is an amenable number.

18409853 is a deficient number, since it is larger than the sum of its proper divisors (5035651).

18409853 is a wasteful number, since it uses less digits than its factorization.

18409853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5152.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 18409853 is about 4290.6704604292. The cubic root of 18409853 is about 264.0483392124.

The spelling of 18409853 in words is "eighteen million, four hundred nine thousand, eight hundred fifty-three".